Breaking down the Dolphins' depth at each position group

Quarterback

Nam Y. Huh / AP

Ryan Tannehill is having a solid camp and appears to be primed to take his game to the next level. His accuracy has improved (he’s completed 81 percent of passes through two preseason games), and it seems like he's pushing to become a better leader. Matt Moore should be viewed as one of the NFL's better backups because of his history, background and familiarity with the offense. McLeod Bethel-Thompson is a practice squad option. Josh Freeman will likely be cut.

Ryan Tannehill is having a solid camp and appears to be primed to take his game to the next level. His accuracy has improved (he’s completed 81 percent of passes through two preseason games), and it seems like he's pushing to become a better leader. Matt Moore should be viewed as one of the NFL's better backups because of his history, background and familiarity with the offense. McLeod Bethel-Thompson is a practice squad option. Josh Freeman will likely be cut.

Depth has been decent, and each running back brings something different to the table. But if Lamar Miller were to suffer a season-ending injury, there would be a substantial drop off. Damien Williams is strong at everything except running between the tackles (3.1 yards per attempt). LaMichael James is a dangerous scatback, but he can't pass block. And rookie tailback Jay Ajayi needs a redshirt season to learn he can't rely on a steady diet of outside runs in the NFL.

Depth has been decent, and each running back brings something different to the table. But if Lamar Miller were to suffer a season-ending injury, there would be a substantial drop off. Damien Williams is strong at everything except running between the tackles (3.1 yards per attempt). LaMichael James is a dangerous scatback, but he can't pass block. And rookie tailback Jay Ajayi needs a redshirt season to learn he can't rely on a steady diet of outside runs in the NFL.

The Dolphins have until Tuesday to trim their preseason roster from 90 to 75, and then by Sept. 5 they need to be down to 53 players and 10 practice squad members. That means time is running out for those on the fringe of earning a spot. Here’s a glance at the Dolphins’ depth at each position: